<!DOCTYPE html>
<html lang="en">

<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
    <style type="text/css">
        .father {
            font-size: 60px;
            color: red;
        }
        
        p {
            font-size: 20px;
            color: blue;
        }
        
        #box {
            color: green;
            font-size: 500px;
        }
    </style>
</head>

<body>
    <div class="father">
        <p>优先级特点</p>
    </div>
</body>

</html>